Probably the worst out of all of Bethesdas games was battlespire, the game that almost put them out of business. The story is... I dunno. You are in a large tower and you need to advance through it. Here are just a couple of the bad mechanics
-you can shoot arrows while paused
-if you use a spell with both arms in use, you grow a 3rd arm.
-Complete absence of Argonians and Khajiits
-Graphics.
Since that is only a couple there are a multitude of videos on YouTube covering the game fully.